Messages in this thread | | | From | Linus Torvalds <> | Date | Wed, 21 Feb 2018 11:50:25 -0800 | Subject | Re: [PATCH 1/2] fs/efivarfs: restrict inode permissions |
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On Wed, Feb 21, 2018 at 11:47 AM, Luck, Tony <tony.luck@intel.com> wrote: > > The EFI calls are all about checking system configuration. A thing > that only a handful of users do on a very occasional basis. I don't > see much harm if my "efibootmgr -v" call is slowed down a bit (or even > a lot) because you are using a bunch of the available ratelimit reading > the efivars. >
It's not about slowing down.
It's about "user Xyz is messing with the system and reading efi vars all the time" resulting in "user 'torvalds' is installing a kernel, and actually wants to read efi vars, but can't".
if you don't make it per-user, you're just replacing one DoS attack with another one!
Linus
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